[BUG] Files are Downloaded as Invalid-File in Whatsapp for Windows Desktop

[CSFelix]

Bug Description

Files are Downloaded as Invalid-File in Whatsapp for Windows Desktop

---

Reproduction

• send a document, except images and videos, to a contact using Baileys;
• open Whatsapp for Windows Desktop and try to download the file using drag-and-drop. Drag the file from Whatsapp to your desktop;
• the file will be downloaded as invalid_file.txt;
• the problem does not happen when you do the same thing to files sent/received via Whatsapp Web and Whatsapp Mobile.

---

Expected behavior

The document should be downloaded with its original content and mimetype.

---

Environment

• Is this on a server?

The bug happened on both: server and localhost

• What do your connectOptions look like?

wsocket = makeWASocket({
  logger: loggerBaileys,
  printQRInTerminal: false,
  auth: state as AuthenticationState,
  generateHighQualityLinkPreview: false,
  syncFullHistory: true,
  markOnlineOnConnect: true,
  patchMessageBeforeSending: message => {
  const requiresPatch = !!(
    message.buttonsMessage || message.listMessage
  );
  if (requiresPatch) {
    message = {
      viewOnceMessage: {
        message: {
          messageContextInfo: {
            deviceListMetadataVersion: 2,
            deviceListMetadata: {}
          },
          ...message
        }
      }
    };
   }
   return message;
   },
  getMessage
});

• Do you have multiple clients on the same IP?

Nope

• Are you using a proxy?

Nope

---

Additional context

• images, videos, stickers and gifs work fine, the problem is related only to documents, such as PDFs, TXTs, ZIPs and RARs;

• This sample from my code sends a PDF File to a contact.

const quoted = {
  quoted: {
    key: <quotedMessage.Key>,
    message: <quotedMessage.Message>
  }
};

const options = {
  document: fs.readFileSync(media.path),
  caption: "pdf file - caption",
  fileName: "pdf file - name",
  mimetype: "application/pdf"
};

const sentMessage = await sock.sendMessage(
  <jid>,
  { ...options },
  { ...quoted }
);

• the attached image shows how the file is downloaded

[CSFelix]

up